Genuine Honda OEM Starter Driven Gear. 40-tooth starter driven gear. Used as part of the electric starting / starting clutch system on select Honda CRF450 motorcycles. Honda parts diagrams identify. Gear, Starter Driven (40T). Brand: Genuine Honda OEM. Genuine Honda replacement part. For example, Honda OEM diagrams list this gear for the. Exact fitment varies by year and model, so please verify. 1 × Genuine Honda. 28110-MKE-A10 Starter Driven Gear (40T).